OGBN P11 Gallbladder polyps: an audit of management in an NHS trust

Abstract

Background Gallbladder polyps are elevations in the gallbladder wall which project into the lumen. These can be either true polyps or “pseudopolyps” (such as cholesterol or inflammatory deposits or focal adenomyomatosis). Polyp prevalence has been estimated as high as 9.5% in some studies, of which 70% may be pseudopolyps. A small minority of true polyps may display malignant potential. Gallbladder malignancy is aggressive, especially when diagnosed at later stages of disease with poor treatment options and survival outcomes. However, Stage I disease has excellent 5 year survival rates, nearing 100%. Early identification of patients at risk of gallbladder malignancy is highly important and may detect curable disease. Joint guidelines between the European Society of Gastrointestinal and Abdominal Radiology (ESGAR), European Association for Endoscopic Surgery (EAES), International Society of Digestive Surgery – European Federation (EFISDS) and European Society of Gastrointestinal Endoscopy (ESGE) have outlined best practice in regards to management of gallbladder polyps. This audit compared the current practice in a NHS healthcare trust against these guidelines in order to develop trust-wide consensus and guidelines for future management. Methods A PACS based radiology search was conducted, identifying all patients who underwent an ultrasound between 10th December 2020 and 10th December 2021, whose imaging report used the term “gallbladder polyp(s)” within a hospital trust. Patients without a diagnosis of gallbladder polyp were excluded from the audit. Historical patient records were accessed via the trust-based online patient database (Clinical Portal). Data were collected and analysed using Microsoft excel. Patient management was compared against the following ESGAR/EAES/EFISDS/ESGE guidelines: Results A total of fifty six patients fit the inclusion criteria, with an age range of 8 to 96 years. The majority were female (63%). Polyp size ranged from <2mm to 14mm. Patients were predominantly managed by Upper GI surgery, gastroenterology and general practice with the Radiology department performing and reporting ultrasounds and advising management or follow up. Results showed that 86% of patients were appropriately offered surgery for polyps ≥ 10mm. However, 40% of patients with polyps >5mm with risk factors, were not offered cholecystectomy and 44% of those without risk factors were not offered appropriate follow up. The majority of patients with polyps ≤ 5mm with risk factors were not offered ultrasound surveillance. All patients without risk factors with polyps ≤ 5mm were appropriately managed. Conclusions Key findings suggest discrepancies in the management of patients with gallbladder polyps in a NHS Trust. In particular, patients with risk factors and polyps between 6–9mm were not always identified as requiring operative management. Likewise, over half of those without risk factors were not offered surveillance imaging. Poor management and lack of follow up may put patients at risk. The results of this audit demonstrate the need for unified local or national guidelines concerning management of gallbladder polyps and consensus across multiple disciplines.